Boiler-feeding device.



NTTED STATES PATENT Fries.

BOILER FEEDING DEVICE.,

SPECIFICATION forming part of Letters latent No. 646,062, dated March2'?, 1900.

Application filed August 8, 1899. Serial No. 726,515. (No model.)

To LZZ whom it may concern.-

Be it known that I, FRANZ JOSEPH WEISS, a citizen of the Republic ofSwitzerland, residing in Basle, in the canton of Basle, in the Republicof Switzerland, have invented a certain new and useful Improvement inBoiler- Feeding Devices, of which the following is a true and exactdescription, reference being had to the accompanying drawings, whichform a part thereof.

My invention relates 'to feed-water pumps for boilers, and particularlyto feed-water pumps of the general character described in my formerpatent, No. 623,229, of April 18, 1899, in which provision is made forautomatically maintaining a determined normal water-level in the boiler.

While my feeding mechanism, as described in my said former patent, isthoroughly effective in its automatic working, it is desirable at timesto place the charging of the boiler with water under the control of theengineer, so that he can continue the workingv of the motor-cylinder ofthe feed-water pump with steam after the water has reached the normalwater-line and until such time as he thinks it desirable to discontinuethe feed and permit the automatic charging mechantoo great a supply ofsteam, while, on the' other hand, if the dow of steam is regulated bymeans of the stop-cock in the supplemental pipe the pressure in theboiler is apt to exceed that in the delivery end of the pipe leadingfrom the water-line level, so that water will be forced through thispipe into the motor-cylinder. This defect in the apparatus can, it istrue,'be overcome by providing, by means of regulating-cocks orotherwise, for a resistance to the flowof fluid through -the steam andwater supply pipe, which will be at all times as great as the backpressure caused by the throttling of the steam in the supplemental pipe,and such mechanism is shown in and forms the subject-matter of myapplication for Letters Patent filed August 8, 1899, Serial No. 726,514.

. My present application has for its object to provide for the positiveclosing of the main steam and water supply pipe whenever thesupplemental pipe is opened and alternatively the closing of thesupplemental pipe Whenever the main pipe is open. This of course can beeffected by coupling-valves in each of the pipes, so that they willalternately and reciprocally close and open the pipes or by providing asingle valve or cock adapted to serve the same purpose. This, however,would be unsatisfactory unless the valve or valves were so constructedand arranged as to make it impossible to simultaneously close both ofthe supply-pipes leading to the pump; and my invention consists, broadlyspeaking, in providing one or more valves arranged to alternately andreciprocally close and open the main and supplemental supply-pipes andin so constructing such valve or valves that they will notsimultaneously close both pipes.

Reference being now had to the drawings in which my invention isillustrated, Figure 1 is a side and partly-sectional elevation of aboiler feed-water-pump reservoir and connections provided with myimproved valve mechanism, which in this case is exhibited in the forniAof separate valves in the main and supplemental feed-pipes coupled so asto move simultaneously. Figs. 2, 3, and L are views illustrating amodification in which a single rotary slide-valve is made to serve thepurpose of the two valves shown in Fig. l, said views showing the valvein the different positions. Fig. 5 is a sectional elevation showinganother vmodification of my invention in .which a piston-valve isemployed; and Fig. 6

is a sectional elevation showing another and my preferred modificationof my invention in which a clack-valve is employed.

A, Fig. 1, indicates the boiler, d indicating the normal water-line,andA' the steam-dome. B is a supplemental chamber connected with the boilerabove and below' the'normal water-line by the passages B and B2.

Y C is the supplemental feed-pump pipe,lead ing from a point in theboiler above the nor- IOO mal water-line, as shown, from the steamdomeA'.

D is the main boiler feed-pipe, leading, as shown, from the supplementalchamber B and opening on the normal water-line of the boiler.

F is the motor-cylinder of the pump, findicating the steam-chamber ofthis cylinder, and F' is the pump-cylinder proper.

G is the feed-water reservoir; I-I, the exhaustpipe of the cylinder F,preferably leading, as shown, into the feed-water reservoir G.

I is a pipe leading from the feed-water reservoir to the suction side ofthe cylinder F', and .I is a pipe leading from the delivery side of thecylinder F' to the boiler, as shown.

K and K', Fig. l, are Valve-chambers situated in the pipes D and C, saidpipes being continued to a connection with the steamchamber F, asindicated at d and c.

L and L are rotary slide-valves working ou the cylindrical walls of thechambers K and K' and adapted, in accordance with their position, toclose and open the openings of the pipes D and C into thevalve-chambers, such openings being indicated at D' and C'. As shown,these valves are actuated by levers M and M', the latter being providedwith a handle and both levers connected by a rod M2, so that the valveswill always move together and to the same degree. The valves arearranged to move through an arc of ninety degrees, and the size of thevalve, the size of the cylindrical valve-chambers K and K', and thearrangement of the openings D' and C', leading into the valve-chambers,are such that while in one extreme position (that shown in full lines inFig. l) the valve L' closes the opening C' and while in the otherextreme position (that indicated in dotted lines) the valve L closes theopening D'. -In all intermediate positions either one or both of theopenin gs L and D' will be opened, so that at no time can themotor-cylinder of the pump be entirely out od from a supply of fluidfrom the boiler.

Preferably instead of using two valves, as shown in Fig. l, I employ asingle valve operating in connection with the supplemental and mainpipes in the same manner. In doing this I connect the pipes D and C witha single and common valve-chamber, as indicated in Figs. 2, 3, and 4 andalso in modified form in Figs. 5 and 6, and I connect this commonvalve-chamber with the steam-chamber of the motor-cylinder of the pumpby what I may call a common pipe, (indicated at E.)

In the construction illustrated in Figs. 2, 3, and 4 a valve L2 takesthe place of valves L and L' of Fig. l, the openings C' and D' arearranged at ninety degrees apart in the valvechamber K2, and the size ofthe said chamber and of the valves L2 is arranged so that said valve inone extreme position will close the opening C', as shown in Fig. 2. Inthe other extreme position it will close the opening D', as shown inFig. 4, while in passing from the one extreme position to the other thevalve cannot at any time close, as is clearly indicated in Fig. 3.

In the construction shown in Fig. 5 the valve-chamber (indicated at K3)is cylindrical and has working in it a piston-valve L3, actuated byastem Mand which, it is obvious, will work in precisely the same way inconnection` with the openings C' and D as the valve L2. In theconstruction shown in Fig. 6 the valve-casing (indicated at K4) is soarranged that the open ends D and C of the supplypipes come opposite toeach other in a chamber 7c' in the casing,and a elack-valve (indicatedat L4) is arranged to work between the two openings, so that in itsextreme position it closes them alternately, while in all intermediatepositionsitleaves them both open. This clackvalve, as shown, is securedto a spindle M, having a threaded portion M5 screwing in a stationarythreaded support m5, MG indicating ahand-wheel by means of which thespindle is rotated.

It will be perfectly obvious that by the use of my invention in any`ofits modifications it is impossible that the connection between theboiler and the motor-cylinder of the pump should ever be entirelysevered. In one extreme position the supply is derived entirely from themain pipe D and will be eithersteam or other uid in accordance with therelation of the actual water-line to the determined normal water-line.In the other eXtreme p0- sition of the valve o1' valves the supply willbe exclusively steam, while in case the `engineer has not shifted hisvalve or valves to the full extent the Worst that can happen is that amixed supply of steam and water may be delivered to the motor-cylinderofthe pump.

It will be obvious that an undue supply of steam, such as would resultin the running away of the pump, may be avoided by so restricting thepassage through the pipe-sections c, d, or E as to prevent thiscontingency occurring.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In combination with a boiler and a feedwater pump adapted to workwith either water or steam as a motive fluid, the motorcylindcr of saidpump being connected with the boiler through conduits, one opening at ornear the normal water-line of the boiler and the other at a point abovesuch waterlevel, means arranged to alternately open and close saidconduits said means being arranged as specified and so as not to closeboth conduits at the same time.

2. In combination with a boiler and a feedwater pump adapted to workwith either water or steam as a motive fluid the motorcylinder of saidpump being connected with the boiler through conduits one opening at ornear the normal water-line of the boiler IOO IIO

and the other at a point above suoh Wateiboiler, said Valve being formedand arranged level and both merging into a common eonas specified so itwill not close both conduits duit by which they connect with the pump,aA at the same time.

valve-casing arranged at the junction of the FRANZ JOSEPH WEISS. 5conduits aforesaid and avalve Working in said casing to alternately andreciprocally close and open the conduits leading to the Witnesses:

GEORGE GIEEORD, ALBERT GRAETER.

